William W. Powers State Recreation Area was created in 1947.
Admiral William Standley State Recreation Area was created in 1944.
The area of Admiral William Standley State Recreation Area is 45.22 acres, or 18.30 hectares.
The area of Prophetstown State Recreation Area is 53 acres.
Sangchris Lake State Recreation Area was created in 1964.
The area of Ionia State Recreation Area is 18.211 square kilometers.
The area of Waterloo State Recreation Area is 84.984 square kilometers.
The area of Benicia State Recreation Area is 1,808,944.8208128 square meters.
The area of Wetzel State Recreation Area is 3,642,170.78016 square meters.
The area of Pinckney State Recreation Area is 44.515 square kilometers.
The area of Pyramid State Recreation Area is 79.727 square kilometers.
The area of Auburn State Recreation Area is 171.494 square kilometers.